Sander.



No. 772,436. PATENTED OUT. 18, 1904 A. SHIELDS.

SANDER.

APPLICATION 'IILED JUNE 24, 1904.

N0 MODEL.

. z r 0 fla/dr v C ///1)///////// ,D c" c m Inve'niar; was v 7 UNITED STATES Patented October 18, 1904.

PATENT OFFICE.

ALEXANDER SHIELDS, OF WINNIPEG, OANADA, ASSIGNO R TO CHARLES BRYDGES, OF WINNIPEG, MANITOBA, CANADA.

SANDER.

SPECIFICATION forming part of Letters Patent No. 772,436, dated October 18, 1904.

Application filed June 24., 1904.

I To all whom at may concern:-

Be it knownthatI, ALEXANDER SHIELDS, a

subject of the King of Great Britain and Ire,

land, residing at Winnipeg, Manitoba, Canada, have invented certain Improvements 1n Sanders, of which the following is a specifi inafter described, and particularly pointed out in the claim represents a sectional view through the invention; Fig. 2, a plan view of Fig. 1, and Fig. 3

is a plan view showing the engineers Valve with connections leading therefrom.

In the drawings, A indicates a pipe which leads from'the' supply of sand contained in the box suitably located on the engine or car. At the lower end of this pipe a casting A is attached by a screw-thread connection at a,

and a pipe B is also screw-threaded into this casting and extends therefrom at right angles to the pipe A. This pipe B forms the delivery-pipe for the sand and leads to a point in front of the driving-wheels and closeto the rails, with its end at such an angle that when the sand is blown through this pipe it will be deposited on the rail immediately in front of the point of-contact between the wheel and the rail. In order to force the sand which falls through the pipe A into the casting out through the pipe B, a nozzle C is screwthreaded into the casting A, the opening in the said nozzle having its axis coinciding with the axial line of the pipe B, so that-the jet of air issuing from this nozzle will force the sand from the casting, so as to be delivered through the pipe B to the desired point. It will be noticed that the nozzle is loeated at the rear of the casting, so that the sand is free to fall down from the pipe A in front of the nozzle without obstruction. The nozzle nozzle. In the accompanylng drawings, Figure l.

Serial No, 214,033. (No model.)

C is combined with a cylinder or chamber G, and in this a piston D is adapted to slide back and forth, said piston having a tapered pin 0 on its front end adapted to fit the tapered bore of the nozzle and when in aforwardposition to project through the said bore and free the same from any sand which may have collected therein. The chamber C receives the air-pressure from a pipe and when the air is turned into this pipe it forces piston D backwardly and allows the air to blow into the body of the sander or the casting A to force the sand therefrom through pipe B, as before stated. A pipe E communicates with the rear of the cylinder or chamber back of the piston D, and when air is turned into this pipe the piston will be forced forward and its taper pin will clean out the opening in the Fig. 3 represents the valve which is used to control the air-pressure to the pipes C and E. The valve is indicated in its closed position, but when turned a quarter-way around in the direction of the arrow it is in its operative position that is, so that the air-pressure will pass through'the nozzle and force the sand into. the pipe Band upon givingthe her having a clean-out pin, an air-supply pipe leading to the front of the chamber, an airsupply pipe leading to the rear of said chamber back of the piston and means for controlling said air-supplies, substantially as described. 1 t

In witness whereof I have hereunto set my hand in presence of two witnesses.

.A. SHIELDS.

Witnesses:

G. BRYDGES, M. J. FINKELSTEIN; 

